<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>
<body>
   <div id="app">
    <button @click="isHot=!isHot">改变天气</button>
    <div>
        <h1>以下是今天的天气播报</h1>
        <!-- v-if接受一个布尔值,控制元素是否渲染出来到浏览器中 -->
        <p v-if="isHot">今天天气贼热</p>
        <p v-if="!isHot">今天的天气微凉</p>
    </div>
   </div> 
   <script>
    const vm =new Vue({
        el:'#app',
        data(){
            return {
                isHot:true
            }
        }
    })
   </script>
</body>
</html>